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    <script>
        //若 obj1 的 pid === obj 的 id 则 obj1 是 obj 的子级
        //  obj { .....   obj1{}...obj2...}
        const list = [
            { id: "01", name: "张大大", pid: "", job: "项目经理" },

            { id: "02", name: "小亮", pid: "01", job: "产品leader" },
            { id: "07", name: "小丽", pid: "02", job: "产品经理" },
            { id: "08", name: "大光", pid: "02", job: "产品经理" },

            { id: "03", name: "小美", pid: "01", job: "UIleader" },
            { id: "09", name: "小高", pid: "03", job: "UI设计师" },
            { id: "05", name: "老王", pid: "01", job: "测试leader" },
            { id: "06", name: "老李", pid: "01", job: "运维leader" },

            { id: "04", name: "老马", pid: "01", job: "技术leader" },
            { id: "10", name: "小刘", pid: "04", job: "前端工程师" },
            { id: "11", name: "小华", pid: "04", job: "后端工程师" },
            { id: "12", name: "小李", pid: "04", job: "后端工程师" },

            { id: "13", name: "小赵", pid: "05", job: "测试工程师" },
            { id: "14", name: "小强", pid: "05", job: "测试工程师" },
            { id: "15", name: "小涛", pid: "06", job: "运维工程师" }
        ]
        // dataList === data 是需要遍历的偏平数组
        function arrToTree(dataList) {

            const newTreeDateList = []

            dataList.forEach(item =>{

                if(item.pid=== ""){
                    newTreeDateList.push(item)
                }

                const children = list.filter(date => date.pid === item.id)
                item = {...item,children}
            })
            return newTreeDateList
        }
        const res =  arrToTree(list)
        console.log(res)
    </script>
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